Grooving-tool.



W. ROTHMAN.

GROOVING TOOL.

APPLICATION FILED SEPT-25.1914.

1,1 58,725. Patented Nov. 2, 1915.

ifilneases WILLIAM ROTl-IMAN, OF RACINE, WISCONSIN.

GRoovING-TooL,

, Specification of Letters Patent.

Application fil ed September 25, 1914. Serial No. 863,506.

To all whom it may concern:

Be it known that'I, WILLIAM ROTHMAN, a subject of the Emperor of Austria-Hungary, and aresident of Racine, 'countyof Racine, and State of Wisconsin, have invented certain new and useful Improvements in Grooving-Tools, of which the following is a specification.

The main objects of this invention are toprovide an improved form of grooving tool particularly adapted for use in looking the seams of sheet metal pipes and tubes; to provide improved means for adjusting the jaws oft-he tool to fit various sized seams whereby the tool is capable of replacing several such tools, each of a different size, heretofore used for locking pipe seams; to provide improved means for maintaining the parallel alinement of the jaws; and to provide a tool of this kind which is simple and inexpensive to manufacture. 1

An illustrative embodiment of this invention is shown in the accompanying drawlngs in which- I Figure 1 is a perspective view of the improved grooving tool. Fig. 2 is a side elevation of the same. Fig. 3 is a right end elevation of the tool. Fig. 4 is a view illustrating the manner in which the tool is used.

In the construction shown in the drawings, the tool comprises a head or body member 5 integrally formed on a shank or handle 6. The tool is preferably made of forged steel. V

A jaw 7 is integrally .formed along one edge of the body member 5, with which a movable jaw 8 is arranged to coact. The movable jaw S is shiftably mounted between guides 9 and 10 integrally formed at the ends of the body member 5 and extending transversely to the fixed jaw 7 A bolt 11, carried by the'fixed jaw 7, supports the movable jaw 8, the shifting of which, toward and away from the movable jaw, is controlled by means of a nut 12. A- spring 13 interposed between the jaws 7 and 8 embracing the rod 11, normally urges the jaw 8 away from the jaw 7. A shoulder or ledge 14 is integrally formed on the body member 5 inwardly of, and extending along, the guide 10. A recess 15 is formedin the corresponding corner of the'movable jaw'8 so as to snugly fit the shoulder 14; and coact therewith for obtaining a truer parallel alinement of the jaws 7 and 8. A scale 16 is laid off on the guide 9 so to register with the advancing edge 17 of the movable tance between said jaws, and to facilitate the setting of the jaws to fit a certain sized seam.

following manner :The jaws 7 and 8 are firstad usted so as to fit the seam 18 formed by the interlocking edges of the pipe or Patented Nov. 2, 1915.

jaw 8 for the purpose of indicating the dis- The device herein shown is used in the tube 19; The operator then grasps the tool 1 by the handle 6 and sets the jaws over the seam, as shown in Fig. 4, and strikes a blow on the end of'the handle 6. The metal is forced down, as shown in Fig. 4, so as to lock the seam and prevent it from becoming disengaged before it is clenched or sealed, as the case may be. By virtue of the adjustability of the jaws 7 and 8, this tool is capable of replacing the several difierent sized tools that heretofore have made up a complete equipment of grooving tools. It is simple and inexpensive to manufacture and saves a. tinner considerable expense in equipping himself for this kind of work.

Although but one specific embodiment of this invention has been herein shown and described, it will'be understood that some details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

1. A tool for, locking the seams of sheet metal tubes, comprising a handle shank, a head carried by said shank, a pair of jaws supported on said head in substantially parallel relation and adapted to engage the of said jaws being rigid on said head and the other being movable toward and away from said one jaw for varying the distance between said jaws whereby said tool is capable of being used on seams of various sizes.

3. A tool for locking the seams of sheet metal tubes, comprising a handle shank, a

head carried by said shank, a pair of jaws supported on' said head in substantially parallel relation and adapted to engage the opposite edges of the seam to be locked, one

of said jaws being rigid on said head, and

guide members formed on said head trans-f used on seams of various sizes.

4; A tool for locking the seams of sheet metal tubes, comprising a handle shank, a

head carried by said shank, a j aw integrally formed along one side of said head, guide members on said head extending transversely to said jaw, a movable jaw shiftably mounted on said head between said guide members and disposed parallel to said one jaw, a bolt carried by said-fixed jawand extending through said movable jaw, a spring interposed between said jaws normally urging said movable jaw away from said fixed jaw, and a nut on said bolt adapt- Copies of this patent may be obtained for five cents each, hyaddressing the Commissioner of Patents,

ed to be actuated for shifting said movable jaw for vary ng the cllstance between said jaws whereby said tool is capable of being 7 used on sea-ms of-various sizes.

'5. A tool of the class described, comprising a body'member, a jaw rigidlyfixefd thereon, guides on said member extending transversely. of said" fixed jaw, a movable jaw shiftably mounted on said member between said guides and disposed parallel to said fixed j aw, a shoulder formecl-on said body member at the side 1 of one .of'said guide members-said movablew aw being re:

coact therewith for maintaining'the parallel o relation of said j aw", and means "for shifting said movable jaw toward 3 and away from said fixed aw 'for the. purpose specified.

cessed tofit said shoulder-and adapted 'to- Signed at Chicago this day of Sept.

191$. a v V 1 v V WILLIAM ROTHMAN;

Witnesses: 1 e a WILLIAM E. VIIANN,"

HAZEL G. COFFMAN.

Washington,.D. G, 

